<b>Casio</b>&#39;s fx-85GT Plus takes the UK&#39;s number one scientific <b>calculator</b> a step further by now offering Solar Power to ensure no loss of battery during those crucial exams. Additional functions also include Verify, Prime Factorisation and Recurring Decimal, along with the coveted Natural textbook Display and solar power. The large 10+2 Natural Display shows mathematical expressions like roots and fractions as they appear in your textbook. Dual-powered by both solar and battery power, the calculator boasts 260 functions and is allowed in every UK exam where a calculator can be used.